709246640 has 20 divisors (see below), whose sum is σ = 1648998624. Its totient is φ = 283698624.

The previous prime is 709246633. The next prime is 709246661. The reversal of 709246640 is 46642907.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 709246594 and 709246603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4432712 + ... + 4432871.

Almost surely, 2^709246640 is an apocalyptic number.

It is an amenable number.

709246640 is an abundant number, since it is smaller than the sum of its proper divisors (939751984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

709246640 is a wasteful number, since it uses less digits than its factorization.

709246640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8865596 (or 8865590 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 709246640 is about 26631.6848884933. The cubic root of 709246640 is about 891.7964975109.

The spelling of 709246640 in words is "seven hundred nine million, two hundred forty-six thousand, six hundred forty".